Butterfly sponge mop head



FIG. 1 is a front perspective view of a butterfly sponge mop head, showing my new design;

FIG. 2 is a top plan view thereof.

FIG. 3 is a front elevational view thereof.

FIG. 4 is a left side elevational view thereof.

FIG. 5 is a bottom plan view thereof.

FIG. 6 is a rear elevational view thereof. 

The ornamental design for a butterfly sponge mop head, as shown and described. 